Protective lining



Patented May 19, 1931 preferably designed for use in JAMES D OBRIEN, F

BROOKLYN, NEW' YORK PROTECTIVE LININ G Application filed February 23, 1928. Serial No. 256,306.

This invention relates to and comprehends animproved protective lining which serves as a wear-resisting'surface for various purposes.

The invention primarily contemplates the wear-resisting surface or linin which is blowers'employed for feeding powdered or pulverized abrasive substances, such as powdered fuel, or the like;

It has been found in practice that the active faces of the blades in certain portions of the casing become scored and wear out within a very limited period of time due to the abrasive action of the substance being fed thereby. In order to increase the length of life or usefulness of the surfaces subjected to such wear, the present invention aims to provide in said surfaces serrations which form pockets which filled with the substance beingfed thereby present in effect surfaces substantially completely protected by the substance which will be refilled thereby as the scoring is produced thereon.

More specifically,the invention contemplates the formation in the surface or lining applied thereto of substantially ratchetshaped serrations within which the substancevcollects for the purpose specified.

'Other objects of the invention reside in the comparative simplicity of construction of same, the economy with which the same may be produced and installed, and the general efliciency derived therefrom.

With the above recited and other ob ects in view, reference is had to the following description and the accompanying drawings in which there is exhibited one example or embodiment of the invention, while the ape pended claims define the actual scope of the invention.

In the drawings Figure 1 is a fragmentary sectional view through a blower equipped with a protective lining or surfaceconstructed in accordance with the invention;

Figure 2 is a transverse sectional view I therethrough;

Figure 3 is an enlarged fragmentary detaile sectional view.

Referring to the drawings by the characters of reference, 10 designates the casing within which the fan 11 is mounted for rotation, said fan having the usual radial blades 12. On the leading faces of the blades 12 lining elements 13 are provided, while on the portion of the interior of the casing 10 where protective lining 14 is proing the operation of the fan. When the substance S is deposited and packed down within the pockets, grooves or serrations, as clearly illustrated in Figure 3, it is obvious that the said substance S is subjected to the scoring action of the substance being fed through the blower and that the scores caused by the substance being fed will be rapidly refilled. It is, therefore, obvious that only the apexes of the teeth will be subjected to the wearing action so that practically all the wear falls upon the substance packed in the pockets.

What is claimed is 1. An apparatus including a member having a surface subject to wear by the abrasive action of comminuted material impinged thereagainst, said member having contiguous substantially V-shaped parallel grooves in said surface for producing a protective cover- 1 ing consisting of aggregations of said material collected 'in said grooves.

2-. An apparatus for handling material which tends to abrade the surfaces thereof against which it is impinged, said surfaces having contiguous grooved portions to constitute means for collecting and retaining aggregationsof said material to minimize abrasion of the surfaces, said' grooves each being defined by a straight wall and an inclined wall, the inclined Wall of each groove terminating at the outer edge of the straight wall.

3. An apparatus including a member having a surface subject to wear by abrasive action of comminuted material impinging thereagainst, said member having parallel grooves of gradually increasing Width from the inner portions to the outer end portions, the adjacent edges of the. grooves being sufficiently close toeach other to eliminate substantially the surface contour Where the grooves are provided so that when said grooves have collected and retained aggrega 10 tions of the material therein, the grooved portion of the surface will be protected against abrasion.

Signed at New York city in the county of New York and State of New York this 20th 15 day of February 1928. 4

JAMES D. OBRIEN. 

